Salt-cake furnace.



J. H.NIELD.

SALT CAKE FURNACE. APPLIGATIOiI FILED AUG. 6, 1909.

Patented July 30; 1912.

.5 sHmTssHnET 1.

l/VVf/VTOR JOHN H. N/ELD WITNESSES ll TTO-RIVE V S J. H. NIELD.

SALT CAKE FURNACE.

APPLIOATION FILED AUG. 6, 1909.

1,083,250 I Patented July 30,1912.

5 SHEETS-SHEET 2.

WI THE 885 8 ATTORNE V8 Patented July 30, 1912.

5 SHEETS-SHEET 3.

IIV'I EAITOR JOHN H. lV/ELD WITNESSES ATTOEA'EXS J. H. NIELD.

SALT CAKE FURNACE.

APPLICATION FILED AUG.6, 1909.

Patented July 30, 1912.

5 BHEETSSHEET 5.

INVENTOR dflH/V fL/V/ELD WITNESSES i si norm :1.- mass, or HACKENSACK new :rnnsnv, ASSIGN-OR 'ro GENERAL CHEMICAL. COMPANY, or new YOE'. n. v.5 A CORPORATION or New Years.

saw-cans FURNACE.

1,633,825, Specification oi Letters Patent. Patented July 30, 1912,

Application filed August 6, 1909. Serial No. $11 ,510. q I

To all whom z'zfmay concern: the requisite sulfuric acid while the solid Be it known that LfJoHN HERBERT NIELD,: material, say a mikture ofcommbn'. salt and a citizen of the United States, and resident salt cake is fed through a hopper B. Both of Haekensack, Bergen county, New J ersey, substances are discharged into a-chamber C have invented certain new and useful Inr; arranged-on top of' tlre'furnacaproper con- 60 provements in Salt-Cake Furnaces, ofw'hich taining a worm D or other device for feedt-he following is a specification. ing the mixture transversely so. that it may My invention relates to furnaces and par-l reach the inlets E arranged in the "upper ticularly. to such in which the material un- Wall F of the furnace proper. The mixture der trea'tment is propelled gradually from thus drops on the bottomG' of' the furnace,

one end of the furnace to the other so that at one end thereof. Any suitable construe the -residual material'is'removed. liiOn is p y for heating channels in I have designed"he apparatus shown in the top wall and also channels G" in the the accompanying drawings with especial bottom wall. The. hydrochloric acid gas e, I

.5 reference to the manufacture ofhydrochloric evolved during the operation is Withdrawn 70 acid from a mixture of sulfuric acid and through an aperture H (see Fig.3.) sodiumfchlo'rid to which I have added, no The mechanism for feeding or ropellin cording to a process which forms the sub the material lengthwise on the liottom 6' ject matter of another application for patent from the inlet end to .the outlet is operated 2o fil d by me August 21, 1909, Serial No. from a shaft I which may be driven by, 514,629, a'suitable amount of an inert mameans of gearing J, said shaft having a terial which will keep the mixture in a firm crank connection at. I with a connecting condition sothat the mechanical propelling rod K attached at to a slide, or I-beam-N. devices employed by me may be available. A closure slide L moves in lutcs M secured The-mere mlxture of sulfuric acid with comto the side walls N291 the ifurnace proper. 8

mon salt produces a semi-fluid mass which The slides L run free intlutes M; the opencould not befed by propelling devices of ings are kept air-tight for example by means the character herein disclosed. The inert of sand or other suitablesolid material of a material admixed to produce a more solid suitable fineness or any other material such 3 condition of he mixture may for instance as glycerin. Thelutes are spaced-and the be salt cake. openings are left in the side walls-of ,the Some features of ray-apparatus are capafurnace adjacent to said lutes but such openble'of 'a "broa(l application wherever it is ings are closed by the closure slides L. The desired'to'f'e'ed oi" advance material before, said slides and propelling devices are can 35 during or after treatment. riecl ont-he slides or Lbeams i 2 which travel, 90 "Inthe accompanying drawings Figure 1 on rollers. The said slides carry one 'or a side elevation of a furnace embodying more propelling devices. Iuthe particular my invention; Fig. 2 is a plan view thereof furnace shown there are four sets of prowith'theupper wall of the furnace removed polling devices. Each set comprises three t so as to disclose the propelling devices; Fig. members, the central, member is carried by- 9 3. is a cross section on line 3-3 of Figs. 1 a shaft 0 whichalso forms a connection beand 2; 'Fifgy is'a horizontal section on line tween the opposite slides and said shaft is 4- 4 of Fig.3; Fig. 5 is a partial side eleprovided at each end with a pinion 0 en vation drawn upon an enlarged scale; Fig. gaging a stationary rack 0 so that, as the 6 is across section on line 6-6 of Fig. 5; slide end reciprocates, the shaft 0 will be,}0 0 Fig. 7 is a detailed side elevation of another turned first in one direction and then in the portion of the furnace; Fig. 8 is a vertical other. The shaft 0 is provided with outsection on line 8-8 of Fig. 7 Fig. 9 is a wardly extending projections or pins 0*, partial plan view showing one of the feed which serve to stir or break up the material in'g devices; Fig. 10 is a vertical section on so as to keep it from forming lum s. line lO--10 of" Fig. 9; and Fig. 11 is a sec- In advance and in the rear of eac shaftO' tional detail showing the feed worm, the bearings N are-arranged on the slide N -and feed chamber and the lut-ed closure for the in these bearings are journaled rock shafts latter. P, It extending clear across the furnace 55 it indicates a suitable pipe for supplying and also forming connections between the passage slides N Within the furnace these rock shafts carry arms Q, Q respectively, to which are secured shovels or feeding members R, R the shape of which is shown best in Figs. 9 and 10. I may also secure to one of the shafts P, P a series of teeth S arranged to project between the teeth 0 so as to keep them clean and stripped of any material adhering to them. On the outside of the furnace the shafts P are provided with arms T carrying rolls U adapted to work in conjunction with stationary guides. These comprise a lower guide V, a short upper guide V and a guide V hinged at V and of such a length that it will normally rest in an inclined position as shown in Figs. 1 and 7. Let us imagine that the'rollers U first rest on the lower guide V and that the slide N then travels toward the right in Fig. 7 the rake or propelling device carried by the corresponding arms Q will be in its lower operative position. As the roller U comes in contact with the hinged guide V it will lift said guide and pass beyond it, the guide falling back by gravity into the position shown in Fig. 7. When thereupon the slide N moves toward the left the roller U will ride up the inclined guide V thus lifting the corresponding rake teeth R away from the material in the furnace so that the return movement will not affect the position of the material. When the roller U in traveling toward the left reaches the end of the upper guide V, it will drop ofi' said guide, thus restoring the corresponding rake to its lower operative.

position. A similar action occurs at the same time in regard to the rakes carried by the arms Q. For this purpose 'the shafts P carry arms T provided with rollers U.

These rollers work in conjunction with horizontal lower guldes .W, short horizontal upperguides W and inclined guides 1V hinged at W adjacent to one end of the .upper guide W and adapted to rest on the action of the upper guide W until the roller,

U drops off the left-hand end of said guide. It will therefore be seen that the material is only moved in one direction, that is toward the outlet, all the rakes being raised off the material when the slides move toward' the inlet. The teeth 0 however, which do not act to feed the material but simply to keep it in a proper condition, are

operative both during the forward and the return movement of the slides. As shown in Fig. 10 the rake teeth R, B should preferably be inclined downwardly toward the outlet portion of the apparatus. I

It will be seen, especially with reference to Figs. 1 and 7, that the distance between the guides V, V is gre'ater than that between the guides WV, W and thus the up and down movement of the rear rakes R is greater than that of the front rakes R.

I claim as my invention:

1. The combination of a support for'the material to be fed, a slide arrangement to reciprocate lengthwise of said support, a feed member carried by the slide and movable relatively thereto toward and from said support, and means, governed by the reciprocation of the slide, for moving the feed member relatively to the slide.

2. The combination of a support for the material to be fed, a slide arranged to reciprocate lengthwise of said support, a feed member carriedby the slide and pivoted thereto to swing toward and from said support, and means, governed by the reciprocation of the slide, for swinging the feed member on its pivot.

3. The combination of a support for the material to be fed, a slide arranged to reciprocate lengthwise of said support, a plurality of feed members carried bysaid slide A tandemwise, and each movable relatively thereto toward and from said support, one of said members having a greater throw than its neighbor, and separate means for each feed member, governed by the reciprocation of the slide, for bringing the feed members toward the support into their operative position and then away from the support. a

4. The combination of a support for the material to be fed, a slide arranged to reciprocate lengthwise of said support, two swinging feed members carriedby the slide tandemwise and extending in opposite directions from their pivots, and means, governed by the reciprocation 0f the slide, for swinging the feed members alternately toward and from the support.

5. The combination of a support for the material to be fed, a slide arranged to reciprocate lengthwise'of said support, a feed member connected with the slide pivotally and having an arm connected therewith, two guides extending lengthwise of the slides movement at different distances from said support and a third guide hinged at one end of one of the first-named guides and extending to the other guide, the said three guides being adapted for engagement with said arm to throw the feed member alternately toward and from the support.

6. The combination of a support for the material to be fed, a slide arranged to reciprocate lengthwise of the support, two feed members carried by the slide tandem- ,Wise and arranged to move alternately toward and from the support and a'stirring material to be fed a slide arranged to re- "'ciprocate lengthwise of the support, two

feed members carried by theslide tandem- .wise and movable toward and from the sup I port, a rotary stirring member carried by the slide between said feed membersand means governed by the reciprocation of the slide for rotating said stirring member and carrying the feed members alternately toward and from the support.

8. The combination of a support for the material to be fed, a slide arranged to reciprocate lengthwise of the support, two swinging feed members carried by the slide tandem'wise and extending in opposite direction'from their pivots, a rotary stirring member carried by the slide between the feed members and means governed by the reciprocation of the slide for rotating the stirring member and swinging the feed -members alternately toward and from the support.

9. The combination of a support for the material to be fed, a slide arrangedto reciprocate lengthwise of said support, two members carried by the slide tandemwise and movable relative thereto toward and from the support, said members beingprovided with rake teeth inclined in the direction toward which the material is to be fed and means governed by thereciprocationo the slide for carrying said feed members alternately toward and from the support.

10. The combination of a support for the -material to be fed, a longitudinally apertiiiied Wall," at the side of said support, a slide positioned externally of said wall and adapted to reciprocate lengthwise thereof, and a feed member-and a closure member supported by said slide, said feed member extending through said aperture and said closure member having a luted connection with said wall whereby said aperture is sealed by said closure member.

11. 111e combination of a support for the material to be fed, longitudinally apertured walls at the sides of said support,slides positioned externally of said Walls and adapted to reciprocate lengthwise thereof, and a feed member and closure members supported by said slides, through said apertures and said closure members having luted connections with said walls whereby said apertures are sealed by said closure members.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

J. H. NIELD.

Witnesses BERNI-IARD G. Hnssn, -Fnrrz v. Eurasian.

said feed member extending v 

